20111000022001 has 4 divisors (see below), whose sum is σ = 22984000025152. Its totient is φ = 17238000018852.

The previous prime is 20111000021977. The next prime is 20111000022017. The reversal of 20111000022001 is 10022000011102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20111000022001 - 2¹⁵ = 20110999989233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111000022041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1436500001565 + ... + 1436500001578.

It is an arithmetic number, because the mean of its divisors is an integer number (5746000006288).

Almost surely, 2^{20111000022001} is an apocalyptic number.

It is an amenable number.

20111000022001 is a deficient number, since it is larger than the sum of its proper divisors (2873000003151).

20111000022001 is an equidigital number, since it uses as much as digits as its factorization.

20111000022001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2873000003150.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20111000022001 its reverse (10022000011102), we get a palindrome (30133000033103).

The spelling of 20111000022001 in words is "twenty trillion, one hundred eleven billion, twenty-two thousand, one".